SONY HCD-NEZ50 Service Manual

HCD-NEZ50

SERVICE MANUAL

Ver. 1.3 2007.04

• HCD-NEZ50 is the amplifier, CD player, tape deck
and tuner section in CMT-NEZ50.

Model Name Using Similar Mechanism NEW

CD Section Base Unit Name BU-K8BD83S-WOD

Optical Pick-up block Name KSM-213CDP

TAPE Section

Model Name Using Similar Mechanism NEW
Tape T r ansport Mechanism Type CMAL5Z235A

AEP Model

UK Model

E Model

SPECIFICATIONS

Amplifier section

European model:

DIN power output (rated): 18 + 18 W (6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference): 25 + 25 W (6 ohms at 1 kHz,
10% THD)
Music power output (reference): 38 + 38 W

The following are measured at AC 220 V, 50/60 Hz (Argentina model),
AC 120 V, 60 Hz (Mexican model), AC 120, 220 or 230 − 240 V, 50/60 Hz
(other models)

DIN power output (rated): 14 + 14 W (6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference): 20 + 20 W (6 ohms at 1 kHz,
10% THD)

Inputs

AUDIO IN: Sensitivity 250 mV, impedance 47 kilohms

Outputs

PHONES: Accepts headphones with an impedance of 8 ohms or more
SPEAKER: Accepts impedance of 6 to 16 ohms

CD player section

System: Compact disc and digital audio system
Laser Diode Properties

Emission Duration: Continuous
Laser Output*: Less than 44.6µW
* This output is the value measurement at a distance of 200 mm from the

objective lens surface on the Optical Pick-up Block with 7mm aperture.

Tape deck section

Recording system: 4-track 2-channel, stereo

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section:

Tuning range

87.5 − 108.0 MHz (50 kHz step)
Antenna: FM lead antenna
Antenna terminals: 75 ohms unbalanced
Intermediate frequency: 10.7 MHz

AM tuner section:

Tuning range
Pan-American model: 530 − 1,710 kHz (with 10 kHz tuning interval)
531 − 1,710 kHz (with 9 kHz tuning interval)
European model: 531 − 1,602 kHz (with 9 kHz tuning interval)

Other models: 530 − 1,710 kHz (with 10 kHz tuning interval)
531 − 1,602 kHz (with 9 kHz tuning interval)
Antenna: AM loop antenna, external antenna terminal
Intermediate frequency: 450 kHz

General

Power requirements

Mexican model: AC 120 V, 60 Hz
European model: AC 230 V, 50/60 Hz
Korean model: AC 220 V, 60 Hz
Argentina model: AC 220 V, 50/60 Hz
Other models: AC 120, 220 or 230 − 240 V, 50/60 Hz
Adjustable with voltage selector

Power consumption:

European model: 60 watts

0.5 watts (in Power Saving Mode)
Other models: 50 watts

Dimensions (w/h/d) (excl. speakers):

Approx. 164 × 235 × 267 mm

Mass (excl. speakers):

Approx. 3.7 kg

Design and specifications are subject to change without notice.

9-887-080-04

2007D05-1
© 2007.04

COMPACT DISC DECK RECEIVER

Sony Corporation

Personal Audio Division
Published by Sony Techno Create Corporation

HCD-NEZ50

Ver. 1.3

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270 ˚C

during repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering

or unsoldering.

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.

This appliance is
classified as a CLASS
1 LASER product. This
marking is located on the
rear exterior.

TABLE OF CONTENTS

1. SERVICING NOTES ............................................... 3

2. GENERAL ................................................................... 5

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 7

3-2. Cabinet............................................................................. 7

3-3. Cabinet (Top) Section...................................................... 8

3-4. Base Unit (BU-K8BD83S-WOD) ................................... 8

3-5. Front Panel Assy.............................................................. 9

3-6. Mechanical Deck (CMAL5Z235A) ................................ 9

3-7. MAIN Board Block ......................................................... 10

3-8. Tuner (FM/AM)............................................................... 10

4. TEST MODE.............................................................. 11

5. MECHANICAL ADJUSTMENTS ....................... 12

6. ELECTRICAL ADJUSTMENTS ......................... 13

7. DIAGRAMS

7-1. Block Diagram – CD SERVO Section – ......................... 15

7-2. Block Diagram – MAIN Section –.................................. 16

7-3. Printed Wiring Board – CD Board – ............................... 18

7-4. Schematic Diagram – CD Board – .................................. 19

7-5. Printed Wiring Boards – MAIN Section – ...................... 20

7-6. Schematic Diagram – MAIN Section (1/2) – .................. 21

7-7. Schematic Diagram – MAIN Section (2/2) – .................. 22

7-8. Printed Wiring Board – PANEL Board – ........................ 24

7-9. Schematic Diagram – PANEL Board – ........................... 25

7-10. Printed Wiring Boards – DC Section – ........................... 26

7-11. Printed Wiring Board – AC Board –................................ 27

7-12. Schematic Diagram – POWER SUPPLY Section –........ 28

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PAR TS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANU AL OR
IN SUPPLEMENTS PUBLISHED BY SONY.

8. EXPLODED VIEWS

8-1. Cabinet Section................................................................ 34

8-2. Front Mechanical Deck Section ...................................... 35

8-3. PANEL Board Section..................................................... 36

8-4. Cabinet (Top) Section...................................................... 37

8-5. MAIN Board Section....................................................... 38

8-6. AC Board, DC Board Section ......................................... 39

9. ELECTRICAL PARTS LIST................................ 40

Refer to SUPPLEMENT-1 f or the HEAD PHONE board of printed
wiring board, schematic diagram and electrical parts list of
Argentina and Korean models.
When repairing the set of except Argentina and Korean models,
refer to either of original service manual/SUPPLEMENT-1
according to the set.

Refer to SUPPLEMENT-2 for the PANEL board of printed wiring
board, schematic diagram and electrical parts list of Argentina
and Korean models.
When repairing the set of except Argentina and Korean models,
refer to either of original service manual/SUPPLEMENT-2
according to the set.

2

SECTION 1

SERVICING NOTES

HCD-NEZ50

Ver. 1.3

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick­up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead­free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 ˚C higher

than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK

During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S820. (push switch type)
The following checking method for the laser diode is operable.

• Method

Emission of the laser diode is visually checked.

1. Open the upper lid.

2. Push the S820 as shown in Fig.1.

Note: Do not push the detection lever strongly, or it may be bent or damaged.

3. Press the u button.

4. Check the object lens for confirming normal emission of the
laser diode. If not emitting, there is a trouble in the automatic
power control circuit or the optical pick-up.
In this operation, the object lens will move up and down 2
times along with inward motion for the focus search.

S820

Fig.1 Method to push the S820

MODEL IDENTIFICATION
– Rear View –

Model Name Part No.

AEP model 2-665-914-0[]
UK model 2-665-915-0[]
E model 2-665-916-0[]
Mexican model 2-665-917-0[]
Chilean and Peruvian models 2-665-918-0[]
Argentina model 2-665-919-0[]
Korean model 3-106-566-0[]

Part No.

3

HCD-NEZ50

k

SERVICE POSITION

– CD BOARD –

CD board

– TAPE MECHANICAL DECK –

cabinet (top) section

tape mechanical dec

4

Basic Operations

Before using the system

To use the remote

Slide and remove the battery compartment lid wa, and
insert the two supplied R6 (size AA) batteries,
first, matching the polarities shown below.

• With normal use, the batteries should last for about six months.

• Do not mix an old battery with a new one or mix different types of

batteries.

• If you do not use the remote for a long period of time, remove the
batteries to avoid damage from battery leakage and corrosion.

To set the clock

1

Turn on the system.

Press

"/1

(power) 1.

2

Select the clock set mode.

Press CLOCK/TIMER SET
current mode appears on the display, press

qd

on the remote repeatedly to select “CLOCK” and

then press ENTER

3

Set the time.

Press

./>

the hour, and then press ENTER
Use the same procedure to set the minute.
The clock settings are lost when you disconnect the
power cord or if a power failure occurs.

qk

w;

on the remote.

qd on the remote repeatedly to set

E

side

on the remote. If the

./>

w;

on the remote.

SECTION 2

GENERAL

Selecting a music source

Press the following buttons (or press FUNCTION qg
repeatedly).

To select Press

CD
Tuner TUNER/BAND
Tape TAPE
Component (connected

using an audio cord)

Adjusting the sound

To adjust the volume

Press VOLUME +/− on the remote (or turn the
VOLUME control on the unit)

To add a sound effect

To Press

Generate a more dynamic
sound (Dynamic Sound
Generator X-tra)

Set the sound effect

Playing a CD/MP3 disc

1

Select the CD function.

Press CD

2

Place a disc.

Press

Z

PUSH OPEN/CLOSE 8 on the unit,
and place a disc with the label side up on the CD
compartment.
To close the CD compartment, press

8

CLOSE

3

Start playback.

Press

N

(play) wf on the remote (or CD/u (play/

qh

pause)

To Press

Pause playback

Stop playback
Select a folder on an

MP3 disc
Select a track or file

Find a point in a
track or file

Select Repeat Play REPEAT

To change the play mode

Press PLAY MODE 5 repeatedly while the player is
stopped. You can select normal play (“
files in the folder on the disc), shuffle play (“SHUF” or

SHUF*”), or program play (“PGM”).

“

* When playing a CD-DA disc, (SHUF) Play performs the same

operation as normal (SHUF) Play.

Notes on Repeat Play

• All tracks or files on a disc are played repeatedly up to five times.

• “REPEAT 1” indicates that a single track or file is repeated until you

stop it.

Notes on playing MP3 discs

• Do not save other types of files or unnecessary folders on a disc that
has MP3 files.

• Folders that have no MP3 files are skipped.

• MP3 files are played back in the order that they are recorded onto

the disc.

• The system can only play MP3 files that have a file extension of
“.MP3.”

• If there are files on the disc that have the “.MP3” file extension,
but that are not MP3 files, the unit may produce noise or may
malfunction.

• The maximum number of:

− folders is 150 (including the root folder).

− MP3 files is 255.

−

MP3 files and folders that can be contained on a single disc is 256.

− folder levels (the tree structure of files) is 8.

• Compatibility with all MP3 encoding/writing software, recording

device, and recording media cannot be guaranteed. Incompatible
MP3 discs may produce noise or interrupted audio or may not play
at all.

CD

FUNCTION
until “AUDIO IN” appears.

DSGX

EQ
repeatedly to select “BASS”
or “TREBLE,” and then
press
repeatedly to adjust the level.

qh

on the remote.

on the unit.

Z

PUSH OPEN/CLOSE

on the unit).

X

(pause) wf on the remote (or

u

CD/
unit). To resume play, press the
button again.

x

(stop) qf.

+/– (select folder)

./>

qd

.

Hold down
forward)
and release the button at the
desired point.

repeatedly until “REPEAT” or
“REPEAT 1” appears.

qh

on the remote.

qh

.

qh

on the remote.

qg

repeatedly

9

.

6

on the unit.

ws

on the remote

./>

qd

Z

PUSH OPEN/

(play/pause) qh on the

7

.

(go back/go forward)

./>

(rewind/fast

qd

during playback,

ql

on the remote

” for all MP3

Notes on playing multisession discs

• If the disc begins with a CD-DA (or MP3) session, it is recognized
as a CD-DA (or MP3) disc, and playback continues until another
session is encountered.

• A disc with a mixed CD format is recognized as a CD-DA (audio)
disc.

Listening to the radio

1

Select “FM” or “AM.”

Press TUNER/BAND

2

Select the tuning mode.

Press TUNING MODE
appears.

3

Tune in the desired station.

Press +/− on the remote (or TUNING +/− on the unit)

qd

. Scanning stops automatically when a station is
tuned in, and then “TUNED” and “STEREO” (for
stereo programs) appear. When you tune in a station
that provides RDS services, the station name appears
on the display (European model only).

To stop automatic scanning

Press x (stop) qf.

To tune in a station with a weak signal

If “TUNED” does not appear and the scanning does
not stop, press TUNING MODE
“AUTO” and “PRESET” disappear, and then press
+/− on the remote (or TUNING +/− on the unit)
repeatedly to tune in the desired station.

To reduce static noise on a weak FM stereo
station

Press FM MODE ql on the remote repeatedly until
“STEREO” disappears to turn off stereo reception.

qh

repeatedly.

5

repeatedly until “AUTO”

5

repeatedly until

qd

Playing a tape

1

Select the tape function.

Press TAPE

qh

2

Insert a tape.

Press PUSH OPEN/CLOSE
insert the TYPE I (normal) tape into the cassette
holder with the side you want to play facing forward.
Make sure there is no slack in the tape to avoid
damaging the tape or the tape deck. Press PUSH
OPEN/CLOSE
cassette holder.

3

Start playback.

Press
(play/pause)

To Press

Pause playback

Stop playback
Rewind or fast

forward

on the remote.

Z

q; on the unit, and

Z

q; on the unit again to close the

N

(play) wf on the remote (or TAPE/u

qh

on the unit).

X

(pause) wf on the remote (or

u

(play/pause) qh on the

TAPE/
unit). To resume play, press the
button again.

x

(stop) qf.

m/M

(rewind/fast forward) qd.

Changing the display

To change Press

Information on
the display*

Display mode
(See below.)

* For example, you can view CD/MP3 disc information, such as the

track or file number or folder name during normal play, or the total
play time while the player is stopped.

The system offers the following display modes.

Display mode When the system is off,

Clock The clock is displayed.
Power Saving

2)

Mode

1)

The STANDBY indicator lights up when the system is off.

2)

When the system is in Power Saving Mode, the following functions
are unavailable:

− setting the clock.

− changing the AM tuning interval

− changing the CD power manage function

Notes on the display information

• The following are not displayed;

− total playing time for a CD-DA disc depending on the play mode.

− total playing time for an MP3 disc.

− remaining playing time for an MP3 file.

• The following are not displayed correctly;

− elapsed playing time of an MP3 file encoded using a VBR

(variable bit rate).

− folder and file names that do not follow either the ISO9660 Level
1, Level 2 or Joliet in the expansion format.

• The following are displayed;

− ID3 tag information for MP3 files when ID3 version 1 and version

2 tags are used.

− up to 30 characters of ID3 tag information using uppercase letters
(A to Z), numbers (0 to 9), and symbols (" $ % ’ ( ) * + , − . / < =
> @ [ \ ] _ ` { | }).

wh

on the remote

DISPLAY
repeatedly when the system is on.

DISPLAY

wh

on the remote

repeatedly when the system is off.

1)

The display is turned off to conserve
power. The timer and clock continue
to operate.

HCD-NEZ50

This section is extracted from
instruction manual.

Using optional audio
components

To connect an optional headphones

Connect headphones to the PHONES jack qs on the
unit.

To connect an optional component

Connect additional audio component to the AUDIO
IN jack

qs

on the unit using an audio analog cord (not
supplied). Turn down the volume on the system, and then
press FUNCTION
function.

qg

repeatedly to select the AUDIO IN

5

HCD-NEZ50

Creating your own CD program

(Program Play)

Use buttons on the remote to create your own program.

1
2

3

4

5

6

To cancel Program Play

Press PLAY MODE 5 repeatedly until both “PGM” and
“SHUF” disappear while the player is stopped.

To delete the last track or file of the program

Press CLEAR wd while the player is stopped.

To view program information, such as total
track number of the program

Press DISPLAY wh repeatedly.

Presetting radio stations

You can preset your favorite radio stations and tune
them in instantly by selecting the corresponding preset
number.
Use buttons on the remote to preset stations.

1

2

3

4
5

6

Other Operations

Press CD qh to select the CD function.
Press PLAY MODE 5 repeatedly until “PGM”

appears while the player is stopped.
Press ./> qd repeatedly until the desired

track number appears.

When programming MP3 files, press
folder) 7 repeatedly to select the desired folder, and
then select the desired file.

Selected track or file number

otal playing time of program

Press ENTER w; to add the track or file to the
program.

“– –.– –” appears when the total time exceeds 100
minutes for a CD, or when you select an MP3 file.

Repeat steps 3 through 4 to program additional
tracks or files, up to a total of 25 tracks or files.

To play your program of tracks or files, press N
(play)

The program remains available until you open the CD
compartment. To play the same program again, select
the CD function, and press

Tune in the desired station (see “Listening to the
radio”).

Press TUNER MEMORY wg.

Press +/– qd repeatedly to select your desired
preset number.

If another station is already assigned to the selected
preset number, the station is replaced by the new
stations.

Press ENTER w;.
Repeat steps 1 through 4 to store other stations.

You can preset up to 20 FM and 10 AM stations. The
preset stations are retained for about half a day even
if you disconnect the power cord or if a power failure
occurs.

To call up a preset radio station, press TUNING
MODE
and then press +/–
desired preset number.

(including selected track or file)

wf

.

5

repeatedly until “PRESET” appears,

qd

repeatedly to select the

N

(play) wf.

+/− (select

Preset number

Recording onto a tape

You can record on a TYPE I (normal) tape in two ways:

CD Synchro Recording:

You can record an entire CD onto a tape.

Manual Recording:

You can record just the portions you like from a sound
source, including connected audio components.

Use buttons on the unit to control tape recording.

1

Load a recordable tape with the side you want to
record facing forward.

2

Prepare the recording source.
For CD Synchro Recording:

qh

on the remote to select the CD function.

Press CD
Load the disc you want to record.
When recording a folder from an MP3 disc, press
PLAY MODE
press
the desired folder.
To record only your favorite CD tracks in your desired
order, perform steps 2 through 5 of “Creating your
own CD program.”

For Manual Recording:

Select the desired source to record.

3

Set the tape deck to stand by for recording.
For CD Synchro Recording:

Press CD SYNC

For Manual Recording:

Press

4

Start recording.

While recording, you cannot listen to other sources.

For CD Synchro Recording:

Press
is completed, the CD player and the tape deck stop
automatically. If you are recording onto a tape and
the tape reaches the end of the front side part-way
through a track or file, “TURN TAPE” appears. Turn
the tape over to the reverse side, re-insert it, and
“PUSH REC” appears. And then press
START

For Manual Recording:

Press
the desired recording source.
If there is noise while recording from the tuner,
reposition the appropriate antenna to reduce the noise.

To stop recording

Press x (stop) qf.

Note

Recording stops if you change to a different function.

5

repeatedly to select “

+/– (select folder)

2

.

z

PAUSE/START 4.

z

PAUSE/START 4. When the recording

4

.

z

PAUSE/START 4, and then start playing

7

repeatedly to select

z

PAUSE/

” and then

Using the Timers

The system offers three timer functions. You cannot
activate both the Play Timer and the Rec Timer at the
same time. If you use either with the Sleep Timer, the
Sleep Timer has priority.

Sleep Timer:

You can fall asleep to music. This function works even if
the clock is not set.

wj

Press SLEEP
“AUTO,” the system automatically turns off after the
current disc or tape stops or in 100 minutes.
Do not select “AUTO” during Synchro Recording of a
tape.

Play Timer:

You can wake up to CD, tape or tuner at a preset time.

Rec Timer:

You can record a preset radio station at a specified time.

Use buttons on the remote to control the Play Timer and
the Rec Timer. Make sure you have set the clock.

1

2
3

4

Press

5

on the remote repeatedly. If you select

Prepare the sound source.
For Play Timer:

Prepare the sound source, and then press VOLUME

9

to adjust the volume.

+/−
To start from a specific CD track or MP3 file, create
your own CD program.

For Rec Timer:

Tune in the preset radio station.

Press CLOCK/TIMER SET qk.
Press ./> qd repeatedly to select “PLAY

SET” or “REC SET” then press ENTER

“ON TIME” appears, and the hour indication flashes.

Set the time to start playing or recording.

./>

qd repeatedly to set the hour,

and then press ENTER

The minute indication flashes. Use the procedure
above to set the minute.

Use the same procedure as in step 4 to set the
time to stop playing or recording.

w;

w;

.

.

6

Select the sound source or prepare the tape.
For Play Timer:

./>

Press
sound source appears, and then press ENTER
display shows the timer settings.

For Rec Timer:

Load a recordable tape. The display shows the timer
settings.

7

Press '/1 (power) 1 to turn off the system.

The system turns on 15 seconds before the preset
time. If the system is on at the preset time, the Play
Timer and the Rec Timer will not play or record.

To activate or check the timer again

Press CLOCK/TIMER SELECT qk, press ./> qd
repeatedly until “PLAY SEL” or “REC SEL” appears,
and then press ENTER

To cancel the timer

Repeat the same procedure as above until “OFF”
appears, and then press ENTER

To change the setting

Start over from step 1.

Tips

• The Play Timer setting remains as long as the setting is not canceled

manually.

• The volume is reduced to minimum during the Rec Timer.

• The Rec Timer is canceled automatically after the Rec Timer has

been activated.

qd repeatedly until the desired

w;

.

w;

.

w;

. The

6

• This set can be disassembled in the order shown below.

)

3-1. DISASSEMBLY FLOW

SET

3-2. CABINET

(Page 7)

3-3. CABINET (TOP) SECTION

(Page 8)

HCD-NEZ50

SECTION 3

DISASSEMBLY

3-5. FRONT PANEL SECTION

(Page 9)

3-6. MECHANICAL DECK (CMAL5Z235A)

(Page 9)

Note: Follow the disassembly procedure in the numerical order given.

3-2. CABINET

4

connector

(CN313)

3-4. BASE UNIT (BU-K8BD83S-WOD)

(Page 8)

3-7. MAIN BOARD

(Page 10)

3-8. TUNER (FM/AM)

(Page 10)

2

two

screws

×

(BVTP 3

3

10)

1

two

screws

(BVTP 3

×

10

5

cabinet

2

three

screws

(BVTP 3

×

8)

7

HCD-NEZ50

)

)

3-3. CABINET (TOP) SECTION

1

screw
(BVTP 2.6)

5

connector
(S820)

2

claw

3

6

cabinet (top) section

4

wire (flat type) (23 core

(CN317)

3-4. BASE UNIT (BU-K8BD83S-WOD)

1

screw
(BVTP 2.6)

3

2

base unit

claw

(BU-K8BD83S-WOD)

5

vibration proof rubber (red)

6

base unit (BU-K8BD83S-WOD)

1

wire (flat type) (23 core

4

vibration proof rubber (green)

2

four

(PWH 2.6

screws

×

10)

(CN201)

8

3-5. FRONT PANEL ASSY

s

)

3

connector
(CN900)

9

front panel assy

8

screw

×

(BVTP 3

6)

2

connector
(CN301)

1

4

flexible flat cable (11 core) (E, E51, MX, AR) /
flexible flat cable (13 core) (AEP, UK, KR)
(CN320)

5

flexible flat cable (17 core)
(CN321)

HCD-NEZ50

Ver. 1.3

connector
(CN315)

3-6. MECHANICAL DECK

(CMAL5Z235A)

7

three

screws

(BVTP 3

×

6

flexible flat cable (13 core)
(CN500)

•

8

screw
(BVTT 3

×

8)

6)

Abbreviation
AR : Argentina model
E51 : Chilean and Peruvian model
KR : Korean model
MX : Mexican model

1

wire (flat type) (6 core)
(FFC801)

2

three

screws

(BVTP 2.6

2

×

8)

screw
(BVTP 2.6

×

8

3

terminal lead wire

4

mechanical deck
(

CMAL5Z235A

)

9

HCD-NEZ50

k

)

Ver. 1.3

3-7. MAIN BOARD BLOCK

•

Abbreviation
AR : Argentina model
E51 : Chilean and Peruvian models
KR : Korean model
MX : Mexican model

1

two connectors
(CN902, CN903)

4

flexible flat cable (9 core) (E, E51, MX, AR, KR) /
flexible flat cable (11 core) (AEP, UK )
(CN319)

2

screw (BVTT 3

5

×

8)

MAIN board bloc

3-8. TUNER (FM/AM)

3

flexible flat cable (9 core) (E, E51, MX, AR, KR) /
flexible flat cable (11 core) (AEP, UK)

•

Abbreviation
AR : Argentina model
E51 : Chilean and Peruvian models
KR : Korean model
MX : Mexican model

3

4

tuner (FM/AM)

10

2

1

two

screws

(BVTP 3

×

8

SECTION 4

TEST MODE

HCD-NEZ50

COLD RESET

The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning the
set to the customer.

Procedure:

1. Press the I/1 button to turn the power on.

2. While pressing the x button, press the I/1 button and turn

the [VOLUME] knob in the counter-clock wise.

3. The message “RESET” is displayed and the set is reset.

PANEL TEST

All segments of liquid crystal display are tested, and the version
and released date of the micro computer are displayed.

Procedure:

1. Press the I/1 button to turn the power on.

2. While pressing the [DSGX] button, press the l m button

and turn the [VOLUME] knob in the counter-clock wise.
Then all segments of liquid crystal display are turned on.

3. Press the [DSGX] button, the version and released date of the

micro computer are displayed.

example of display:

1104 V104

Version of micro computer
(In this case, version 104)

released date of micro computer
(In this case, released of November 4)

4. Press the [TUNER/BAND] button, the model name and

distination are displayed.

example of display:

6NE5 CE2

CD ERROR HISTORY

When this mode is entered, optical pick-up error code is displayed
with the 8-character format on the fluorescent indicator tube.

Procedure:

1. Set the FUNCTION to CD.

2. While pressing the [DSGX] button, press the CD u button

and turn the [VOLUME] knob in the counter-clock wise.

3. CD error history is displayed on the liquid crystal display.

The first digit from the left indicates:

The first digit from the left indicates which mode the error history
is. In the optical pick-up error code mode, “D” is displayed on the
liquid crystal display.

The second digit from the left indicates:
(Error history No. display)

The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.

The third and 4th digit from the left indicates:
(Error status display)

The third and 4th digit from the left indicates which error status is
indicated.

Display Status

01 Not focused (TOC read without a disc)

02 GFS NG (TOC read with a disc chucked)

03 Start operation time-over

04 Defocused continuously (Defocused during TOC reading)

05 Q code not entered for specified time

06 Tracking not turned ON

07 Blank disc (Blank disc TOC read)

distination
(In this case, European model)

model name
(In this case, HCD-NEZ50)

5. Press the [PLAY MODE/TUNING MODE] button, “KEY 0 0” is

displayed on the liquid crystal display, and key test mode in.
Each time a key is pressed, the numerical value corresponding
to each key is displayed on the liquid crystal display.

6. To exit from this mode, perform the “COLD RESET”.

TUNER STEP CHANGE-OVER
(EXCEPT AEP, UK MODELS)

Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.

Procedure:

1. Set the FUNCTION to AM, and press the I/1 button to turn

the power off.

2. While depressing the [TUNER/BAND] button, press the I/1 button.

3. The message “9K STEP” or “10K STEP” is displayed on the
liquid crystal display, and thus the channel step is changed
over.

The 5th and 6th digit from the left indicates:
(Error step display)

The 5th and 6th digit from the left indicates which processing when
a trouble occurred

Display Contents

01 Power OFF in progress

02 Power ON in progress

03 Initialize in progress

04 Oscillation stopping

05 From oscillation stop, oscillation starting

06 Stopping

07 Stop operation is under way

08 Start operation in progress

09 TOC read in progress

0A Search operation is under way

0B Playback operation is under way

0C Pause operation is under way

0D Playback manual search operation is under way

0E Pause manual search operation is under way

The 7th and 8th digit from the left indicates:

The 7th and 8th digit from the left indicates which operation in
progress when a trouble occurred. (Step of each processing of the
5th and 6th digits is indicated)

11

HCD-NEZ50

SECTION 5

MECHANICAL ADJUSTMENTS

CD POWER MANEGE

This mode is for switch the CD power supply on/off. Even if this
state pulls out AC plug, it is held.

Procedure:

1. Press the I/1 button to turn the power on.

2. Set the FUNCTION to CD.

3. Press the I/1 button again to turn the power off (standby).

4. While pressing the CD u button, press the I/1 button.

5. If turns power on and display “CD POWER”, then display
“ON” or “OFF”.

PRECAUTION

1. Clean the following parts with a denatured-alcohol-moistened
swab :

record/playback head pinch roller
erase head rubber belts
capstan idlers

2. Demagnetize the record/playback head with a head
demagnetizer. (Do not bring the head magnetizer close to the
erase head.)

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, appiy suitable locking compound to
the parts adjusted.

5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.

TORQUE MEASUREMENT

Mode Torque Meter Meter Reading

2.95 – 6.86 mN⋅m

FWD CQ-102C (30 – 70 g⋅cm)

(0.42 – 0.97 oz⋅inch)

FWD

Back Tension

FF CQ-201B (more than 60 g⋅cm)

REW CQ-201B (more than 60 g⋅cm)

CQ-102C (1.5 – 5.5 g⋅cm)

0.15 – 0.539 mN⋅m

(0.021 – 0.076 oz⋅inch)

more than 5.89 mN⋅m

(more than 0.83 oz⋅inch)

more than 5.89 mN⋅m

(more than 0.83 oz⋅inch)

TAPE TENSION MEASUREMENT

Mode Tension Meter Meter Reading

FWD CQ-403A

(more than 3.53 oz)

more than 100 g

12

r

SECTION 6

ELECTRICAL ADJUSTMENTS

HCD-NEZ50

0 dB=0.775 VDECK SECTION

1. Demagnetize the record/playback head with a head
demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

TEST TAPE

Tape Signal Used for

P-4-A063 6.3 kHz, -10 dB Azimuth Adjustment

RECORD/PLA YBA CK HEAD AZIMUTH ADJUSTMENT

Note: Remove the cassette lid assy before this adjustment.

2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.

Output
level

within
1dB

L-CH
peak

R-CH
peak

within
1dB

Screw
position

L-CH
peak

Screw
position

R-CH
peak

3. Mode: Playback

test tape
P-4-A063
(6.3 kHz, –10 dB)

HEAD PHONE board
PHONES jack
(J500)

set

oscilloscope

H

V

Procedure:

1. Mode: Playback

test tape
P-4-A063
(6.3 kHz, –10 dB)

HEAD PHONE board
PHONES jack
(J500)

set

level mete

+
–

waveform of oscilloscope

in phase 45°90°135°180

good

°

wrong

4. After the adjustments, apply suitable locking compound to
the pats adjusted.

Adjustment Location: Record/Playback/Erase Head

13

HCD-NEZ50

e

V

CD SECTION

Note:

1. CD Block is basically constructed to operate without adjustment.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10 MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.

5. Check the focus bias check when optical pick-up block is replaced.

FOCUS BIAS CHECK

oscilloscop

(DC range)

CD board

TP (RFACI)
TP (VC)

+
–

Procedure :

1. Connect oscilloscope to TP (RF ACI) and TP (VC) on the CD
board.

2. Press the I/1 button to turn the power ON.

3. Set disc (YEDS-18) on the tray and press the CD u button
to playback.

4. Confirm that oscilloscope waveform is as shown in the f igure
below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.

VOLT/DIV: 200 m
TIME/DIV: 500 ns

level:

0.9

±

0.4 Vp-p

Checking Location:

– CD Board (Conductor Side) –

14

TP

(VC)

IC201

TP

(RFACI)

SECTION 7

DIAGRAMS

7-1. BLOCK DIAGRAM – CD SERVO Section –

OPTICAL

PICK-UP BLOCK

(KSM-213CDP)

A

B

C

D

E

F

LD

PD

AUTOMATIC

POWER CONTROL

Q321

HCD-NEZ50

70

RFACO

57

A

58

B

59

C

60

D

50

E

51

F

66

LD

67

PD

CD DSP

IC201

71

RFACI

AOUT1

AOUT2

XTAO

SSTP

XTAI

112

117

109

108

X201

16.9344MHz

R-CH

• R-ch is omitted due to same as L-ch.

CD

A

(Page 16)

• SIGNAL PATH

: CD PLAY

S201

(LIMIT)

39

D +3.3V

DEVICE

M402

(SLED)

M401

(SPINDLE)

2-AXIS

FOCUS/TRACKING COIL DRIVER,

SLED/SPINDLE MOTOR DRIVER

FCS+

FCS–
TRK+
TRK–

SL+

M

SL–

SP+

M

SP–

12

11
13
14

CH2OUTF

CH2OUTR
CH1OUTR
CH1OUTF

CH3OUTF17

CH3OUTR18

CH4OUTF16

CH4OUTR15

IC402

MUTE

20

CH2FIN

CH2RIN
CH1RIN

CH1FIN

CH3FIN 23

CH3RIN 22

OPIN+

OPOUT

CH4IN

31

O-CD-DATA

30

O-CD-CLK

8

O-CD-XLAT

29

I-CD-SENS

I-MP3-DATA

7
5

O-MP3-DATA

6

O-MP3-CLK

10

O-MP3-XLAT
O-MP3-REQ12

49

I-MP3-REQ

50

I-MP3-ACK

11

O-MP3-SSTB

34

O-CD-XTACN

3

O-CD-XRST

11

O-MP3-SSTB

SYSTEM CONTROLLER

IC801 (1/2)

6

7
5
4

3

27

24

45

FFDR

89

8

DATA
CLOK

XLAT
SENS 20
SCOR

DATA2

CLK2

XLAT-MP3

REQ-MP3

IREQ-MP3 10

ACK-MP3

SSTB-MP3

XTACN

11
16

26 I-CD-SCOR43

12
90
13
14

15
85

7

46

FRDR

44

TRDR

43

TFDR

SFDR

41

SRDR42

38

MDP

XRST

HCD-NEZ50

1515

HCD-NEZ50

Ver. 1.3

7-2. BLOCK DIAGRAM – MAIN Section –

A

(Page 15)

FM 75Ω

COAXIAL

ANTENNA

HRPE301

(REC/PB/ERASE)

CD

AM

L-CH

R-CH R-CH

ERASE

J251

AUDIO IN

TUNER (FM/AM)

FM ANT

ANT GND

AM ANT

ANT GND

ST (TUNED)

RDS DATA

RDS CLK

(AEP, UK)

L-OUT

R-OUT

DI

DO

CLK

CE

REC/PB

SWITCH

Q326 – 329,

Q332, 334, 335

R-CH

R-CH

CLK

TUNED

RDS DATA

RDS CLK

AUX-L

19

18

OUT-L

CD-L

21

R-CH

POWER

AMP

IC501

J500

PHONES

+

ST-L

23

+

DO

DI

CE

TC-L

2

INPUT SELECT,

ELECTRICAL VOLUME

IC302

REC BIAS

SWITCH

Q347, 348

M +10V

CONT

13

RECO-L

28

D313

D320

DC

DETECT

Q318 – 320

DC

DETECT

Q342, 343

D307

L

–

+

R

–

FAN MOTOR

DRIVE

Q316, 317

J302

SPEAKER

M301
(FAN)

MM

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: TUNER

: CD PLAY

: TAPE PLAY

: REC

: AUX IN

MAIN POWER

TRANSFORMER

T902

D920, 936

+

BIAS OSC

T301

(AEP, UK)

BIAS OSC

Q344

AC

DETECT

Q333, 338

TO

POWER AMP

AMP B+

AMP B–

RECT

D918, 919

RECT

D916, 917

TAPE MECHANISM

DECK BLOCK

MOTOR

10V

MM

(CAPSTAN/REEL)

(DECK-A)

END SW

SOL
10V

PACK

REC

CAPSTAN/REEL

MOTOR DRIVE

Q804, 805

PLUNGER

DRIVE

Q802, 803

LCD801

LIQUID

CRYSTAL

DISPLAY

REMOTE CONTROL

RECEIVER

IC802

23

O-TC-MOTOR

22

O-TC-SOL

38

I-TC-REC/PLAY SW

I-TC-END SW

21

COM0 – COM1

59 – 62

SEG0 – SEG32

63, 64, 67 – 89, 94 – 100, 1

I-RMC (SIRCS)

9

DI

DO

CLK

33

56

57

I-TU-DO

O-TU-DI

O-TU-CLK

LED DRIVE

D804, 805

(LCD BACK LIGHT)

CE

TUNED

55

24

O-TU-CE

I-TU-SD (TUNED)

BACK LIGHT

25

Q808

RDS CLK

RDS DATA

27

45

I-TU-RDS-CLK

I-TU-RDS-DATA

STANDBY

O-LED-STBY

17

D806

18

19

O-TC-BIAS

O-TC-REC/PLAY

SYSTEM CONTROLLER

IC801 (2/2)

(CD LID OPEN/CLOSE DETECT)

VOLUME

S801 – 814

(FRONT PANEL KEYS)

32.768kHz

14 13

4

IC-DATA

O-FUNCTION

ROTARY

ENCODER

RV801

X801

X1A

S820

93 92

X0A

X802

4.19MHz

XO

28 I-SW_CD-LID

48 I-RE-VOL

XI

I-KEY0/WAKE-UP,
I-KEY_1

41, 37

2

STK-ON

36

I-P-MONI

+10V

D809

REGULATOR

D303, 304

REGULATOR

REGULATOR

REGULATOR

IC900

+9V

IC303

+3.3V

IC901

+4V

IC903

RECT

D911 – 914

RECT

D907 – 910

D922, 923

SUB POWER

TRANSFORMER

T901

MAIN POWER
RELAY DRIVE

Q315

• Abbreviation
AR : Argentina model
E51 : Chilean and Peruvian models
KR : Korean model
MX : Mexican model

(AEP, UK, MX, AR, KR)

(E, E51)

VOLTAGE

SELECTOR

S901

(AEP, UK, MX, AR, KR)

RY901

(AC IN)

M +10V

M +7V

SYS +3.3V

A +9V

AC DETECT

Q807

CD +1.8V

D +3.3V

D +3.3V

42I-AC-CUT

54RESET

46O-POWER

RESET

SWITCH

Q801

+1.8V

REGULATOR

IC203

VOLTAGE

DETECT

IC803

HCD-NEZ50

1616

HCD-NEZ50

Ver. 1.3

• Note for Printed Wiring Boards and Schematic Diagrams

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

f

•

• : Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

Caution:
Pattern face side: Parts on the pattern face side seen from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.

• Indication of transistor

: internal component.

C

Q

B

B

E

Q

CE

These are omitted.

These are omitted.

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in Ω and 1/
specified.

• f : internal component.

• 2 : nonflammable resistor.

• C : panel designation.

Note: The components identified by mark 0 or dotted line

with mark 0 are critical for safety.
Replace only with part number specified.

• A : B+ Line.

• B : B– Line.

• Voltages and waveforms are dc with respect to ground

under no-signal conditions.
– CD Board –
no mark : CD PLAY
– Other Section –
no mark : TUNER
(): CD PLAY
〈〈 〉〉 : TAPE PLAY
{ }: REC

• Voltages are tak en with a V OM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc­tion tolerances.

• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc­tion tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : TUNER
J : CD PLAY
E : T APE PLAY
j : REC
f : AUX IN

• Abbreviation
AR : Argentina model
E51 : Chilean and Peruvian models
KR : Korean model
MX : Mexican model

4

W or less unless otherwise

• Circuit Boards Location

PANEL board

DC board

AUDIO IN board

CONNECT board

HEAD PHONE board

AC board

CD board

MAIN board

SHIELD board
(E, Chilean and Peruvian,
Mexican, Argentina models)

TUNER (FM/AM)

HCD-NEZ50

1717

HCD-NEZ50

7-3. PRINTED WIRING BOARD – CD Board –

1 2 3 4 567 8 9 10

A

CD BOARD

(COMPONENT SIDE)

C401

B

C406

C

D

E

F

R401

C201

R201

C202

R202

R207

C101

C102

C108

C424

C110

C227

IC203

R423

C203

C226

3

4

1

5

• See page 17 for Circuit Boards Location.

X201

C204

R421

C277

C268

C276

R271

C275

C267

C266

C272

R276

C219

C215

R203

C223

R260

C271

C220

C210

C321

C104

C107

C105

C232

C206

C257

R256

C274

E

Q321

C109

R323

C322

C205

R322

R321

: Uses unleaded solder.

C207

C323

R324

1-868-067-

12

(12)

CD BOARD

(CONDUCTOR SIDE)

C224

TP

(VC)

C251

C253

R252

R253

R255

R254

C256

C252

C254

R102

R101

31

60

M401

(SPINDLE)

R452

R451

R104

R107

R109

R108

30

IC201

61

C208

C258

C230

OPTICAL PICK-UP BLOCK

TP

(RFACI)

CN301

(KSM-213CDP)

C103

R257

C451

R110

C260

R105

R103

R250

M

C264

R258

R265

R278

C221

C261

R268

C273

S201

(LIMIT)

28 22

R280

C405

21 15

C403

IC402

17 14

R277

R275

1

120

91

90

C265

R266

C217

C303

R267

C218

C214

C213

C222

C304

R292

C301

C291

R291

R270

C292

C112

C113

C111

8

C404

R112

R113

R111

1-868-067-

M

M402

(SLED)

CN102

A

12

(12)

MAIN

BOARD

CN317

(Page

20)

HCD-NEZ50

1818